;;; timezone.el --- time zone package for GNU Emacs
-;; Copyright (C) 1990, 1991, 1992, 1993, 1996 Free Software Foundation, Inc.
+;; Copyright (C) 1990, 1991, 1992, 1993, 1996, 1999 Free Software Foundation, Inc.
;; Author: Masanobu Umeda
;; Maintainer: umerin@mse.kyutech.ac.jp
;;; Code:
-(provide 'timezone)
-
(defvar timezone-world-timezones
'(("PST" . -800)
("PDT" . -700)
(defun timezone-make-date-arpa-standard (date &optional local timezone)
"Convert DATE to an arpanet standard date.
-Optional 1st argument LOCAL specifies the default local timezone of the DATE;
+Optional 2nd argument LOCAL specifies the default local timezone of the DATE;
if nil, GMT is assumed.
-Optional 2nd argument TIMEZONE specifies a time zone to be represented in;
+Optional 3rd argument TIMEZONE specifies a time zone to be represented in;
if nil, the local time zone is assumed."
(let ((new (timezone-fix-time date local timezone)))
(timezone-make-arpa-date (aref new 0) (aref new 1) (aref new 2)
(defun timezone-make-date-sortable (date &optional local timezone)
"Convert DATE to a sortable date string.
-Optional 1st argument LOCAL specifies the default local timezone of the DATE;
+Optional 2nd argument LOCAL specifies the default local timezone of the DATE;
if nil, GMT is assumed.
-Optional 2nd argument TIMEZONE specifies a timezone to be represented in;
+Optional 3rd argument TIMEZONE specifies a timezone to be represented in;
if nil, the local time zone is assumed."
(let ((new (timezone-fix-time date local timezone)))
(timezone-make-sortable-date (aref new 0) (aref new 1) (aref new 2)
(5) 22-AUG-1993 10:59:12.82
(6) Thu, 11 Apr 16:17:12 91 [MET]
(7) Mon, 6 Jul 16:47:20 T 1992 [MET]
- (8) 1996-06-24 21:13:12 [GMT]"
+ (8) 1996-06-24 21:13:12 [GMT]
+ (9) 1996-06-24 21:13-ZONE"
;; Get rid of any text properties.
(and (stringp date)
(or (text-properties-at 0 date)
(time nil)
(zone nil)) ;This may be nil.
(cond ((string-match
+ "\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date)
+ ;; Styles: (1) and (2) with timezone and buggy timezone
+ ;; This is most common in mail and news,
+ ;; so it is worth trying first.
+ (setq year 3 month 2 day 1 time 4 zone 5))
+ ((string-match
+ "\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]*\\'" date)
+ ;; Styles: (1) and (2) without timezone
+ (setq year 3 month 2 day 1 time 4 zone nil))
+ ((string-match
"\\([^ \t,]+\\),[ \t]+\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\(T[ \t]+\\|\\)\\([0-9]+\\)[ \t]*\\'" date)
;; Styles: (6) and (7) without timezone
(setq year 6 month 3 day 2 time 4 zone nil))
"\\([^ \t,]+\\),[ \t]+\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\(T[ \t]+\\|\\)\\([0-9]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date)
;; Styles: (6) and (7) with timezone and buggy timezone
(setq year 6 month 3 day 2 time 4 zone 7))
- ((string-match
- "\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]*\\'" date)
- ;; Styles: (1) and (2) without timezone
- (setq year 3 month 2 day 1 time 4 zone nil))
- ((string-match
- "\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date)
- ;; Styles: (1) and (2) with timezone and buggy timezone
- (setq year 3 month 2 day 1 time 4 zone 5))
((string-match
"\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\([0-9]+\\)" date)
;; Styles: (3) without timezone
;; Styles: (4) with timezone
(setq year 3 month 2 day 1 time 4 zone 5))
((string-match
- "\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\.[0-9]+" date)
+ "\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\(\\.[0-9]+\\)?[ \t]+\\([-+a-zA-Z0-9]+\\)" date)
+ ;; Styles: (5) with timezone.
+ (setq year 3 month 2 day 1 time 4 zone 6))
+ ((string-match
+ "\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\(\\.[0-9]+\\)?" date)
;; Styles: (5) without timezone.
(setq year 3 month 2 day 1 time 4 zone nil))
((string-match
"\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date)
;; Styles: (8) with timezone.
(setq year 1 month 2 day 3 time 4 zone 5))
+ ((string-match
+ "\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+\\)[ \t]*\\([-+a-zA-Z0-9:]+\\)" date)
+ ;; Styles: (8) with timezone with a colon in it.
+ (setq year 1 month 2 day 3 time 4 zone 5))
((string-match
"\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)" date)
;; Styles: (8) without timezone.
(setq year 1 month 2 day 3 time 4 zone nil))
)
- (if year
- (progn
- (setq year
- (substring date (match-beginning year) (match-end year)))
- ;; It is now Dec 1992. 8 years before the end of the World.
- (if (= (length year) 1)
- (setq year (concat "190" (substring year -1 nil)))
- (if (< (length year) 4)
- (setq year (concat "19" (substring year -2 nil)))))
- (setq month
- (if (= (aref date (+ (match-beginning month) 2)) ?-)
- ;; Handle numeric months, spanning exactly two digits.
- (substring date
- (match-beginning month)
- (+ (match-beginning month) 2))
- (let ((string (substring date
- (match-beginning month)
- (+ (match-beginning month) 3))))
- (int-to-string
- (cdr (assoc (upcase string) timezone-months-assoc))))))
- (setq day
- (substring date (match-beginning day) (match-end day)))
- (setq time
- (substring date (match-beginning time) (match-end time)))))
- (if zone
- (setq zone
- (substring date (match-beginning zone) (match-end zone))))
+ (when year
+ (setq year (match-string year date))
+ ;; Guess ambiguous years. Assume years < 69 don't predate the
+ ;; Unix Epoch, so are 2000+. Three-digit years are assumed to
+ ;; be relative to 1900.
+ (if (< (length year) 4)
+ (let ((y (string-to-int year)))
+ (if (< y 69)
+ (setq y (+ y 100)))
+ (setq year (int-to-string (+ 1900 y)))))
+ (setq month
+ (if (= (aref date (+ (match-beginning month) 2)) ?-)
+ ;; Handle numeric months, spanning exactly two digits.
+ (substring date
+ (match-beginning month)
+ (+ (match-beginning month) 2))
+ (let* ((string (substring date
+ (match-beginning month)
+ (+ (match-beginning month) 3)))
+ (monthnum
+ (cdr (assoc (upcase string) timezone-months-assoc))))
+ (if monthnum
+ (int-to-string monthnum)))))
+ (setq day (match-string day date))
+ (setq time (match-string time date)))
+ (if zone (setq zone (match-string zone date)))
;; Return a vector.
- (if year
+ (if (and year month)
(vector year month day time zone)
- (vector "0" "0" "0" "0" nil))
- ))
+ (vector "0" "0" "0" "0" nil))))
(defun timezone-parse-time (time)
"Parse TIME (HH:MM:SS) and return a vector [hour minute second].
Recognize HH:MM:SS, HH:MM, HHMMSS, HHMM."
(let ((time (or time ""))
- (hour nil)
- (minute nil)
- (second nil))
+ hour minute second)
(cond ((string-match "\\`\\([0-9]+\\):\\([0-9]+\\):\\([0-9]+\\)\\'" time)
;; HH:MM:SS
(setq hour 1 minute 2 second 3))
)
;; Return [hour minute second]
(vector
- (if hour
- (substring time (match-beginning hour) (match-end hour)) "0")
- (if minute
- (substring time (match-beginning minute) (match-end minute)) "0")
- (if second
- (substring time (match-beginning second) (match-end second)) "0"))
- ))
+ (if hour (match-string hour time) "0")
+ (if minute (match-string minute time) "0")
+ (if second (match-string second time) "0"))))
\f
;; Miscellaneous
If TIMEZONE is nil, use the local time zone."
(let* ((date (timezone-parse-date date))
(year (string-to-int (aref date 0)))
- (year (cond ((< year 50)
+ (year (cond ((< year 69)
(+ year 2000))
((< year 100)
(+ year 1900))
+ ((< year 1000) ; possible 3-digit years.
+ (+ year 1900))
(t year)))
(month (string-to-int (aref date 1)))
(day (string-to-int (aref date 2)))
(- (/ (1- year) 100));; - century years
(/ (1- year) 400)));; + Gregorian leap years
+(provide 'timezone)
+
;;; timezone.el ends here